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[BK7238] KWS-306 wf – FlashTool isn’t decoding the channels; how can I read them before OBK?

GAAD 408 4
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  • #1 21950825
    GAAD
    Level 17  
    Posts: 292
    Help: 3
    Rate: 19
    Hi.
    I’m trying to read the channels on the KWS-306 wf meter based on the BK7238 chip.
    FlashTool hasn’t decoded anything.
    I haven’t flashed the OBK yet.
    Can you help? I’ve attached the files.
    Attachments:
    • readResult_BK7238_QIO_licznik3f_2026-01-8-22-54-32.bin (2 MB) You must be logged in to download this attachment.
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  • #2 21951199
    divadiow
    Level 38  
    Posts: 5238
    Help: 450
    Rate: 920
    It's a TuyaMCU device
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  • Mapping KWS-306 power meter parameters and settings

    #3 21951319
    GAAD
    Level 17  
    Posts: 292
    Help: 3
    Rate: 19
    Yes, I know, I’ve already found most of the parameters, but not all of them:
    101 Power factor
    102 ? Some sort of statistic – perhaps reactive power is increasing, but with a traditional incandescent bulb as the load and cosφ = 1?
    103? Always 0
    104? I don’t know; the value is 22.00
    105? As above; value: 9.00
    106 Operating time
    107 Frequency
    108 Temperature
    121 Status
    125 L1 voltage
    126 L1 current
    127 L1 power
    128 L2 voltage
    129 L2 current
    130 L2 power
    131 L3 voltage
    132 L3 current
    133 L3 power
    134 ?
    135 Total power
    136 Total energy

    PARAMETER SETTINGS
    110 Parameter 1: Upper voltage limit
    111 Parameter 2: Lower voltage limit
    112 Parameter 3: Current limit
    113 Parameter 4: Power limit
    114 Parameter 5: Energy limit
    ??? Parameter 6: Time limit
    115 Parameter 7: Maximum temperature
    116 Parameter 8: Voltage asymmetry
    117 Parameter 9: Current asymmetry
    118 Parameter 10: Screen fade-out time
    ??? Parameter 11: Time reset
    ??? Parameter 12: Counter reset
    ??? Parameter 13: Reset to factory settings
    140 Parameter 14: RS485 address

    142 Perhaps reset counters and return to factory settings?
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  • Helpful post

    Tuya model JSON exposes meter channel definitions

    #4 21952376
    divadiow
    Level 38  
    Posts: 5238
    Help: 450
    Rate: 920
    Code: JSON
    Log in, to see the code
  • #5 21954168
    GAAD
    Level 17  
    Posts: 292
    Help: 3
    Rate: 19
    Thanks to that, we can now finish the work.
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